Modular interchangeable and enbloc series for fixed-electrical installations with electric and electronic equipment, whose principal functions categories are: electromechanical, electronic and infrared switches and controls, pushbuttons, dimmers and relays; socket-outlets for mains supply, television and audio, telephone and electronic data processing signals reception; warning equipment used with neon, fluorescent or incandescent lamps to indicate the operational state of not directly visible appliances, the lighting condition of a room; lamps for location or emergency; similar advising equipment; lighting equipment; bells, buzzers and chimes; admittance request systems for the control of the access to rooms; and other visual and acoustic signalling equipment; electromechanical or electronic equipment specially designed for the protection of the user, of the mains, against electrocution, overload, short circuit, including for instance fuse holders, transient voltage suppressors, circuit-breakers, residual current operated magneto-thermic circuit-breakers, magneto-thermic circuit-breakers and similar equipment; alarms including central control units, sirens, power supplies, detectors, transformers, receivers and transmitters, mounting accessories and spare parts to form an electronic burglar alarm, anti-intrusion system; and other alarms; detectors; control equipment; sound diffusions systems; relevant accessories and spare parts for the foregoing such as are in this class; plugs surface and portable socket-outlets for mains supply and for signal reception, plug-in timers, 1-way and multi-way adaptors, table type socket-outlets, cable reels, flexible-cord and pushbutton-operated switches; consumer units, mounting boxes, junction boxes, enclosures and relevant accessories and spare parts for the foregoing such as are in this class